Canon EOS-1D X Mark III Advanced User's Manual page 632

Selecting multiple images
Multiple images can be transferred at once after you choose a selection method.
1.
Access the [Image sel./transfer] screen.
2.
Select [Multiple].
3.
Select a selection method to use.
Follow steps 1–3 in
Select range
• Select [Select range]. Selecting the first and last images of the
range marks all the images in the range with a checkmark [ ], and
one copy of each image will be sent.
Selecting images to
632
transfer.